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Mitsubishi Ki-23 I - II Kouden - alternative history

The Mitsubishi Ki-23 was created as Kouden enhanced version for the Japanese army, the Version I in 1943 are converted to 150 A6M3. The amendments concern the engine (an engine from 1300 Kinsei Hp), a reinforced structure of the airframe, and an armament of four 20 mm cannons in the wings (125 x weapon).
speed is 585 km / h, the autonomy of 1125 km (2010 km with additional fuel tanks)
Service: 1943-1946. The variant appears
II in 1945 when 1000 A6M Zero (A6M3 and 5) are converted, like the variant Mountains The engine-112 HP 1500-II.
Speed: 622 km / h autonomy: 1030 (1860 km with auxiliary tanks) and four guns as armament 20 mm (125 x weapon).
Service: 1945 - 1947